Antenna system for optimizing antenna pattern

An antenna system for optimizing an antenna pattern, comprising:

• a first antenna metal portion;
• a second antenna metal portion, wherein a gap is between the first antenna metal portion and the second antenna metal portion, to cause an open circuit to be between the first antenna metal portion and the second antenna metal portion;
• a first feeding contact, electrically connected to the first antenna metal portion;
• a second feeding contact, electrically connected to the second antenna metal portion;
• a first ground contact, electrically connected to the first antenna metal portion and farther away from the open circuit than the first feeding contact;
• a second ground contact, electrically connected to the second antenna metal portion and farther away from the open circuit than the second feeding contact;
• a first matching circuit, electrically connected to the first feeding contact;
• a second matching circuit, electrically connected to the second feeding contact;
• a plurality of first ground paths, connected to the first feeding contact;
• and
• a first switch circuit, wherein one end of the first switch circuit is electrically connected between the first feeding contact and the first matching circuit, and the other end of the first switch circuit is electrically connected to the plurality of first ground paths to selectively conduct the first feeding contact to one of the plurality of first ground paths.